Switch Output; Low Power Operation; Function Description - Ebyte E90-DTU User Manual

Low-power digital radio

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Chengdu Ebyte Electronic Technology Co., Ltd.

4.4.2 Switch output

The switching value of the equipment adopts the equivalent circuit of transistor output type as shown in the

figure below, and the transistor output can only be used for the DC24V load circuit. The output wiring mode is

NPN, the load voltage is less than 30V, and the maximum allowable current is 100mA.

E90-DTU (400SL30L) digital radio supports ultra-low power consumption standby, using 4.2V lithium battery

for power supply, the minimum standby power consumption can reach 38uA @ 12V, and can be adapted to outdoor

applications where wiring is impossible or difficult.

The low-power mode requires the master and slave to be enabled at the same time. After the master is enabled,

it will add a wake-up code before the data to wake up the slave. If the master uses a non-low-power mode, it will

cause abnormal communication and cause data loss. The same "WOR period" needs to be used;

The low power consumption mode can only work in a working environment similar to the Modbus request

method (that is, the master initiates a request, and the slave responds immediately). " is used to output the sensor

power in advance. If the sensor power is not controlled by the "radio", this parameter can be configured as 0.

"Sensor response timeout" is used for the time for the slave to receive serial data. Power consumption standby.

In low power consumption mode, after the host sends data, the slave will not output data from the serial port

immediately, but will wait for the "WOR wake-up period" and "early wake-up time" before outputting data, and the

slave will only output data when the "sensor response timeout" The data will be sent correctly within the time limit.

The specific waiting process is shown in the figure below:

E90-DTU(400SL30L)_UserManual_EN

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